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Physical & Chemical properties

Vapour pressure

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Reference
Endpoint:
vapour pressure
Type of information:
read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Study period:
From 15 March, 2012 to 20 March, 2012
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
KL2 due to RA
Justification for type of information:
Refer to the Quaternary ammonium salts (QAS) category or section 13 of IUCLID for details on the category justification.
Qualifier:
according to
Guideline:
EU Method A.4 (Vapour Pressure)
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 104 (Vapour Pressure Curve)
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7950 (Vapor Pressure)
Deviations:
no
GLP compliance:
yes
Type of method:
effusion method: isothermal thermogravimetry
Key result
Temp.:
20 °C
Vapour pressure:
0.002 Pa
Remarks on result:
other: (i.e., equivalent to < 1.1 x 10-5 mm Hg)
Key result
Temp.:
25 °C
Vapour pressure:
0.006
Remarks on result:
other: (i.e., equivalent to < 4.3 x 10-5 mm Hg)
Conclusions:
Based on the results of the read across study, the vapour pressure of the test substance is considered to be <0.0015 Pa (i.e., equivalent to <1.1 x 10E-5 mm Hg) at 20°C and <0.0058 Pa (i.e., equivalent to <4.3 x 10E-5 mm Hg) at 25°C.
Executive summary:

A study was conducted to determine the vapour pressure of the read across substance, Coco TMAC (98.4% active) by isothermal thermogravimetry (effusion method), according to OECD 104, EU Method A.4 and EPA OPPTS 830.7950 Guidelines, in compliance with GLP. Under the conditions of the study, the vapour pressure was determined to be <0.0015 Pa (i.e., equivalent to <1.1 x 10E-5 mm Hg) at 20°C and <0.0058 Pa (i.e., equivalent to <4.3 x 10E-5 mm Hg) at 25°C (Brekelmans, 2012). Based on the results of the read across study, the vapour pressure of the test substance is expected to be in same range.

Description of key information

The vapour pressure of the read across substance, Coco TMAC was determined using the effusion method (isothermal thermogravimetry) according to OECD Guideline 104 and EU Method A.4 and/or  EPA OPPTS 830.7950 (Brekelmans, 2012).

Key value for chemical safety assessment

Vapour pressure:
0.006 Pa
at the temperature of:
25 °C

Additional information

VP <0.0015 Pa at 20°C.